4-Chloro-3-(difluoromethyl)-2-fluoropyridine-5-sulfonyl chloride
2-(Bromomethyl)-3-chloro-6-(difluoromethyl)-5-fluoropyridine
4-Chloro-2-(difluoromethyl)-6-fluoropyridine-3-sulfonyl chloride
4-Chloro-2-(difluoromethyl)-3-fluoropyridine-5-sulfonyl chloride